<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>tmooc.com</title>
    <style>
        body>div>div{
            width: 1220px;
            height: 223px;
            background-color: red;
            margin-bottom: 10px;


        }
        .c1{
            width: 1200px;
            height: 28px;

        }





    </style>


</head>
<body>
<div>
    <div class="c1"></div>
    <div>
        <div></div>
        <div></div>
    </div>
    <div class="c1"></div>
    <div>
        <div></div>
        <div></div>
        <div></div>
        <div></div>
        <div></div>
    </div>
    <div class="c1"></div>
    <div>
        <div></div>
        <div></div>
        <div></div>
        <div></div>
        <div></div>
    </div>
    <div class="c1"></div>
    <div>
        <div></div>
        <div></div>
        <div></div>
        <div></div>
        <div></div>
    </div>
    <div class="c1"></div>
    <div>
        <div></div>
        <div></div>
        <div></div>
        <div></div>
        <div></div>
    </div>
</div>

</body>
</html>